1. The long-term efficacy of currently used dental implants: a review and proposed criteria of success;Albrektsson;The International Journal of Oral & Maxillofacial Implants,1986
2. Consensus statements and recommended clinical procedures regarding esthetics in implant dentistry;Belser;The International Journal of Oral & Maxillofacial Implants,2004
3. Outcome evaluation of early placed maxillary anterior single-tooth implants using objective esthetic criteria: a cross-sectional, retrospective study in 45 patients with a 2- to 4-year follow-up using pink and white esthetic scores;Belser;Journal of Periodontology,2009
4. Long-term stability of contour augmentation with early implant placement following single tooth extraction in the esthetic zone: a prospective, cross-sectional study in 41 patients with a 5- to 9-year follow-up;Buser;Journal of Periodontology,2013
5. Optimizing esthetics for implant restorations in the anterior maxilla: anatomic and surgical considerations;Buser;The International Journal of Oral & Maxillofacial Implants,2004